JPH0290752A - Data transfer device among a plurality of data processing units and its method - Google Patents

Data transfer device among a plurality of data processing units and its method

Info

Publication number
JPH0290752A
JPH0290752A JP1202943A JP20294389A JPH0290752A JP H0290752 A JPH0290752 A JP H0290752A JP 1202943 A JP1202943 A JP 1202943A JP 20294389 A JP20294389 A JP 20294389A JP H0290752 A JPH0290752 A JP H0290752A
Authority
JP
Japan
Prior art keywords
agent
send
cts
packet
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1202943A
Other languages
Japanese (ja)
Other versions
JP2767710B2 (en
Inventor
Michael W Pflaumer
Original Assignee
Sun Microsyst Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US230,180 priority Critical
Priority to US07/230,180 priority patent/US4884266A/en
Application filed by Sun Microsyst Inc filed Critical Sun Microsyst Inc
Publication of JPH0290752A publication Critical patent/JPH0290752A/en
Application granted granted Critical
Publication of JP2767710B2 publication Critical patent/JP2767710B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H04L9/40—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Application independent communication protocol aspects or techniques in packet data networks
    • H04L69/24—Negotiation of communication capabilities

Abstract

PURPOSE: To attain a high transfer speed and to improve the reliability by allowing a transmission agent to send a 1st signal (RTS), allowing a reception agent to send a 2nd signal (CTS) including CTS control characters, and allowing the transmission agent to send data packets at a speed corresponding to the CTS control characters.
CONSTITUTION: An agent to make a request of sending data to a reception agent sends a request to send(RTS) data packet including a control character 36 requesting high or low speed data communication. Upon the receipt of the RTS data packet, after the reception agent receives the RTS packet, the reception agent should send a clear-to-send (CTS) packet within a prescribed period to the transmission agent. Then the transmission agent receiving the CTS packet generates data packets and sends them at a high or low speed according to a value set by the control character 36 in the CTS packet. Thus, a high speed transfer is attained and the reliability is improved.
COPYRIGHT: (C)1990,JPO
JP1202943A 1988-08-09 1989-08-07 Apparatus and method for transferring data between a plurality of data processing devices Expired - Fee Related JP2767710B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US230,180 1988-08-09
US07/230,180 US4884266A (en) 1988-08-09 1988-08-09 Variable speed local area network

Publications (2)

Publication Number Publication Date
JPH0290752A true JPH0290752A (en) 1990-03-30
JP2767710B2 JP2767710B2 (en) 1998-06-18

Family

ID=22864233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1202943A Expired - Fee Related JP2767710B2 (en) 1988-08-09 1989-08-07 Apparatus and method for transferring data between a plurality of data processing devices

Country Status (3)

Country Link
US (1) US4884266A (en)
JP (1) JP2767710B2 (en)
CA (1) CA1338220C (en)

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US7537167B1 (en) * 1993-08-31 2009-05-26 Broadcom Corporation Modular, portable data processing terminal for use in a radio frequency communication network
DE4008727C2 (en) * 1990-03-19 1992-12-17 Aeg Kabel Ag, 4050 Moenchengladbach, De
EP0447841B1 (en) * 1990-03-23 1995-09-13 Siemens Aktiengesellschaft Method for setting-up virtual circuits in an ATM (asynchronous transfer mode) switching system
US5448591A (en) * 1990-06-24 1995-09-05 Next, Inc. Method and apparatus for clock and data delivery on a bus
JP2511591B2 (en) * 1990-10-29 1996-06-26 インターナショナル・ビジネス・マシーンズ・コーポレイション Wireless optical communication system operating method and optical communication system
US7558557B1 (en) 1991-11-12 2009-07-07 Broadcom Corporation Low-power messaging in a network supporting roaming terminals
US6374311B1 (en) 1991-10-01 2002-04-16 Intermec Ip Corp. Communication network having a plurality of bridging nodes which transmit a beacon to terminal nodes in power saving state that it has messages awaiting delivery
US6400702B1 (en) * 1991-10-01 2002-06-04 Intermec Ip Corp. Radio frequency local area network
US5428636A (en) * 1993-05-03 1995-06-27 Norand Corporation Radio frequency local area network
US6407991B1 (en) 1993-05-06 2002-06-18 Intermec Ip Corp. Communication network providing wireless and hard-wired dynamic routing
US6084867A (en) * 1991-10-01 2000-07-04 Intermec Ip Corp. Apparatus and method of routing data in a radio frequency local area network
CA2120520A1 (en) 1991-10-01 1993-04-15 Robert C. Meier A radio frequency local area network
USRE39116E1 (en) 1992-11-02 2006-06-06 Negotiated Data Solutions Llc Network link detection and generation
USRE39395E1 (en) 1992-11-02 2006-11-14 Negotiated Data Solutions Llc Data communication network with transfer port, cascade port and/or frame synchronizing signal
EP0596648A1 (en) 1992-11-02 1994-05-11 National Semiconductor Corporation Network link endpoint capability detection
JP2750315B2 (en) * 1993-05-14 1998-05-13 インターナショナル・ビジネス・マシーンズ・コーポレイション Method of specifying identifier and computer system
US5631897A (en) * 1993-10-01 1997-05-20 Nec America, Inc. Apparatus and method for incorporating a large number of destinations over circuit-switched wide area network connections
US5632016A (en) * 1994-09-27 1997-05-20 International Business Machines Corporation System for reformatting a response packet with speed code from a source packet using DMA engine to retrieve count field and address from source packet
US6055576A (en) * 1996-05-20 2000-04-25 Intel Corporation Access control to packet transfer based on key match stored in cable modem hardware unit
US6111890A (en) * 1997-03-25 2000-08-29 Level One Communications, Inc. Gigabuffer lite repeater scheme
GB9714215D0 (en) * 1997-07-04 1997-09-10 Amp Italia Data transmission method
US6285659B1 (en) * 1997-09-10 2001-09-04 Level One Communications, Inc. Automatic protocol selection mechanism
EP0959590B1 (en) * 1998-05-22 2005-12-14 Canon Kabushiki Kaisha Data communication system operating at maximum data rate
US6094441A (en) * 1998-10-30 2000-07-25 Advanced Micro Devices, Inc. Apparatus and method for controlling transmission parameters of home network stations transmitting on a telephone line medium
US6622264B1 (en) * 1999-10-28 2003-09-16 General Electric Company Process and system for analyzing fault log data from a machine so as to identify faults predictive of machine failures
US6643818B1 (en) * 1999-11-19 2003-11-04 International Business Machines Corporation Storing and using the history of data transmission errors to assure data integrity
US7099352B1 (en) * 2001-01-03 2006-08-29 Juniper Networks, Inc. System, apparatus, and method for increasing resiliency in communications
US6868466B2 (en) * 2001-09-27 2005-03-15 Intel Corporation Apparatus and method for packet ingress interrupt moderation
US7296085B2 (en) * 2002-07-26 2007-11-13 Avago Technologies Fiber Ip (Singapore) Pte Ltd Multiple protocol handshaking between systems
EP2523465B1 (en) * 2011-05-09 2020-04-08 LG Electronics Inc. Service system and method of providing service in digital receiver thereof
US8991704B2 (en) * 2011-12-14 2015-03-31 Intermec Ip Corp. Snap-on module for selectively installing receiving element(s) to a mobile device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58164354A (en) * 1982-03-25 1983-09-29 Nippon Telegr & Teleph Corp <Ntt> Speed matching communication system
JPS6125348A (en) * 1984-07-16 1986-02-04 Nec Corp Method for deciding and notifying communication speed of data communication network
JPS61101146A (en) * 1984-10-24 1986-05-20 Ricoh Co Ltd Document forming communication terminal device
JPS62299148A (en) * 1986-06-18 1987-12-26 Nec Corp Matching system for transmission speed

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3586758T2 (en) * 1985-04-30 1993-04-22 Ibm MODEM FOR CONTROLLING A MODEM NETWORK.
US4747100A (en) * 1986-08-11 1988-05-24 Allen-Bradley Company, Inc. Token passing network utilizing active node table

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58164354A (en) * 1982-03-25 1983-09-29 Nippon Telegr & Teleph Corp <Ntt> Speed matching communication system
JPS6125348A (en) * 1984-07-16 1986-02-04 Nec Corp Method for deciding and notifying communication speed of data communication network
JPS61101146A (en) * 1984-10-24 1986-05-20 Ricoh Co Ltd Document forming communication terminal device
JPS62299148A (en) * 1986-06-18 1987-12-26 Nec Corp Matching system for transmission speed

Also Published As

Publication number Publication date
JP2767710B2 (en) 1998-06-18
US4884266A (en) 1989-11-28
CA1338220C (en) 1996-04-02

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